First checklist of the chrysidid wasps (Hymenoptera, Chrysididae) of Mongolia, with description of new species Author Rosa, Paolo Via Belvedere 8 / d, I- 20881 Bernareggio (MB), Italy https://orcid.org/0000-0003-2919-5297 Author Proshchalykin, Maxim Yu. Federal Scientific Centre for East Asian Terrestrial Biodiversity, Far Eastern Branch of Russian Academy of Sciences, Vladivostok 690022, Russia https://orcid.org/0000-0001-7870-8226 proshchalikin@biosoil.ru Author Halada, Marek Milady Horakove 74 37012 Ceske Budejovice, Czeck Republic Author Aibek, Ulykpan National University of Mongolia, Ulaanbaatar 210646, Mongolia text ZooKeys 2020 999 49 107 http://dx.doi.org/10.3897/zookeys.999.58536 journal article http://dx.doi.org/10.3897/zookeys.999.58536 1313-2970-999-49 34E6CD7AEAD146D4926A61683DFFC740 917CDF077020599AB0CA822B3D80745A Euchroeus orientis Semenov, 1910 Pseudochrysis (Euchroeus) purpurata subsp. orientis Semenov-Tian-Shansky, 1910: 214. Lectotype ♂, designated by Kimsey in Kimsey & Bohart 1991: 296; China: Bugas near Khami, SE of Tian-Shan [China, Xinjiang], 3-5.IX.1895, leg. V. Roborovskij & P. Kozlov (ZIN) (examined). Spinolia (Euchroeus) orientis : Moczar 1967 : 189 (cat., Mongolia: 1 ♂, Suchebaator [= Sukhbaatar] aimag: Ongon elis, 10 km S of Somon Chongor, 900 m, Exp. Dr. Z. Kaszab, 1965, nr. 356, 3.-4.VIII.1965; 1 ♂, 44 km SSW of Baruun urt, 1050 m, Exp. Dr. Z. Kaszab, 1965, nr. 349, 2.-3.VIII.1965). Euchroeus (Euchroeus) purpuratus orientis : Linsenmaier 1968 : 46 (descr., Mongolia, observed in the collections of HNHM and MHNH, without precise localities). Material examined. None examined. Distribution. Mongolia (Sukhbaatar); China (Xinjiang) ( Rosa et al. 2014 ).